Here are some output figures I collected for the EC03 5000k SST40x3.
I used a Samsung 30T 21700 charged on the built-in charging (around 4.18 volts). The lumen measurements were done in my 30 cm integrating sphere with professional lux meter calibrated using a Makkua light. I used Andruil’s default 7 stepped modes. I also calibrated the ambient temperature and thermal limit before the test.
1: 5.52 lumens
2: 32.4 lumens
3: 89.7 lumens
4: 224.25 lumens
5: 668.6 lumens
6: 1449 lumens
7: 2752.5 lumens
Turbo (at turn-on): 5,037 lumens
That’s pretty good! The modes are well-spaced also. I measured the current at the tail cap using a 30T and my clamp meter with a short piece of 12 gauge wire. Turbo was 21.7 amps at 0 seconds, so each emitter is being driven at roughly 7 amps which I think is the best balance of output and heat production. BTW, the EC03 manages heat well. The large head soaks up heat well and cools off quickly as well.
For throw measurements I tested the light indoors at 5 meters. I used the UNI-T UT383S lux meter and tested turbo at 0 seconds and 30 seconds for all you ANSI people.
85,025 cd, 583.18 meters at turn on
80,400 cd, 567.09 meters @ 30 sec.
Looking good! This is the first time I’ve done any formal testing of the EC03, so I’m pretty impressed with it. I beat Banggood’s figure for throw (but not lumens). Overall, this is a great pocketable light!